1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include <sys/signalfd.h>
33 typedef enum LogTarget{
35 LOG_TARGET_CONSOLE_PREFIXED,
38 LOG_TARGET_JOURNAL_OR_KMSG,
40 LOG_TARGET_SYSLOG_OR_KMSG,
41 LOG_TARGET_AUTO, /* console if stderr is tty, JOURNAL_OR_KMSG otherwise */
42 LOG_TARGET_SAFE, /* console if stderr is tty, KMSG otherwise */
45 _LOG_TARGET_INVALID = -1
48 void log_set_target(LogTarget target);
49 void log_set_max_level(int level);
50 void log_set_facility(int facility);
52 int log_set_target_from_string(const char *e);
53 int log_set_max_level_from_string(const char *e);
55 void log_show_color(bool b);
56 bool log_get_show_color(void) _pure_;
57 void log_show_location(bool b);
58 bool log_get_show_location(void) _pure_;
60 int log_show_color_from_string(const char *e);
61 int log_show_location_from_string(const char *e);
63 LogTarget log_get_target(void) _pure_;
64 int log_get_max_level(void) _pure_;
68 void log_forget_fds(void);
70 void log_close_syslog(void);
71 void log_close_journal(void);
72 void log_close_kmsg(void);
73 void log_close_console(void);
75 void log_parse_environment(void);
83 const char *format, ...) _printf_(6,7);
92 va_list ap) _printf_(6,0);
94 int log_object_internal(
100 const char *object_field,
102 const char *format, ...) _printf_(8,9);
104 int log_object_internalv(
110 const char *object_field,
113 va_list ap) _printf_(8,0);
115 int log_struct_internal(
121 const char *format, ...) _printf_(6,0) _sentinel_;
123 int log_oom_internal(
128 /* This modifies the buffer passed! */
129 int log_dump_internal(
137 /* Logging for various assertions */
138 noreturn void log_assert_failed(
144 noreturn void log_assert_failed_unreachable(
150 void log_assert_failed_return(
156 /* Logging with level */
157 #define log_full_errno(level, error, ...) \
159 int _level = (level), _e = (error); \
160 (log_get_max_level() >= LOG_PRI(_level)) \
161 ? log_internal(_level, _e, __FILE__, __LINE__, __func__, __VA_ARGS__) \
165 #define log_full(level, ...) log_full_errno(level, 0, __VA_ARGS__)
168 #define log_debug(...) log_full(LOG_DEBUG, __VA_ARGS__)
169 #define log_info(...) log_full(LOG_INFO, __VA_ARGS__)
170 #define log_notice(...) log_full(LOG_NOTICE, __VA_ARGS__)
171 #define log_warning(...) log_full(LOG_WARNING, __VA_ARGS__)
172 #define log_error(...) log_full(LOG_ERR, __VA_ARGS__)
173 #define log_emergency(...) log_full(getpid() == 1 ? LOG_EMERG : LOG_ERR, __VA_ARGS__)
175 /* Logging triggered by an errno-like error */
176 #define log_debug_errno(error, ...) log_full_errno(LOG_DEBUG, error, __VA_ARGS__)
177 #define log_info_errno(error, ...) log_full_errno(LOG_INFO, error, __VA_ARGS__)
178 #define log_notice_errno(error, ...) log_full_errno(LOG_NOTICE, error, __VA_ARGS__)
179 #define log_warning_errno(error, ...) log_full_errno(LOG_WARNING, error, __VA_ARGS__)
180 #define log_error_errno(error, ...) log_full_errno(LOG_ERR, error, __VA_ARGS__)
181 #define log_emergency_errno(error, ...) log_full_errno(getpid() == 1 ? LOG_EMERG : LOG_ERR, error, __VA_ARGS__)
184 # define log_trace(...) log_debug(__VA_ARGS__)
186 # define log_trace(...) do {} while(0)
189 /* Structured logging */
190 #define log_struct(level, ...) log_struct_internal(level, 0, __FILE__, __LINE__, __func__, __VA_ARGS__)
191 #define log_struct_errno(level, error, ...) log_struct_internal(level, error, __FILE__, __LINE__, __func__, __VA_ARGS__)
193 /* This modifies the buffer passed! */
194 #define log_dump(level, buffer) log_dump_internal(level, 0, __FILE__, __LINE__, __func__, buffer)
196 #define log_oom() log_oom_internal(__FILE__, __LINE__, __func__)
198 bool log_on_console(void) _pure_;
200 const char *log_target_to_string(LogTarget target) _const_;
201 LogTarget log_target_from_string(const char *s) _pure_;
203 /* Helpers to prepare various fields for structured logging */
204 #define LOG_MESSAGE(fmt, ...) "MESSAGE=" fmt, ##__VA_ARGS__
205 #define LOG_MESSAGE_ID(x) "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(x)
206 #define LOG_ERRNO(error) "ERRNO=%i", abs(error)
208 void log_received_signal(int level, const struct signalfd_siginfo *si);
210 void log_set_upgrade_syslog_to_journal(bool b);